I just wanted to drop a thank you note for the work you do. Thanks to you I don’t have to be afraid to keep using the suburban due to the noise.  Based on some youtube videos, I thought I had some mechanical issues where tearing the top end of the engine apart was the fix (replacing the roller lifter and cam shaft). Thanks to you I just saved a pretty penny (hundreds of dollars) and a weekend worth of work (if I’m lucky). Again, thank you!